EP 0776477 A1 19970604 - METHOD AND DEVICE FOR THE MEASUREMENT OF ELECTRIC CURRENTS IN AT LEAST TWO MEASUREMENT RANGES
Title (en)
METHOD AND DEVICE FOR THE MEASUREMENT OF ELECTRIC CURRENTS IN AT LEAST TWO MEASUREMENT RANGES
Title (de)
VERFAHREN UND ANORDNUNG ZUM MESSEN VON ELEKTRISCHEN STRÖMEN AUS WENIGSTENS ZWEI MESSBEREICHEN
Title (fr)
PROCEDE ET SYSTEME PERMETTANT DE MESURER DES COURANTS ELECTRIQUES DANS AU MOINS DEUX PLAGES DE MESURE
Publication
Application
Priority
- DE 9501079 W 19950816
- DE 4429909 A 19940823
- DE 4431615 A 19940905
Abstract (en)
[origin: WO9606359A1] The invention calls for two Faraday elements (3 and 4), connected in series by optical means (34), to be positioned round a conductor (2). The Faraday effect on linearly polarized light (L1) which has only passed through the first Faraday element (3) is taken as a measure of current in a first measurement range. The Faraday effect on linearly polarized light (L2) which has passed through both Faraday elements (3, 4) is taken as a measure of current in a second measurement range.
IPC 1-7
IPC 8 full level
G01R 33/032 (2006.01); G01R 15/24 (2006.01); G01R 19/00 (2006.01)
CPC (source: EP US)
G01R 15/246 (2013.01 - EP US)
Citation (search report)
See references of WO 9606359A1
Designated contracting state (EPC)
BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
WO 9606359 A1 19960229; CA 2198255 A1 19960229; DE 19580887 D2 19970528; DE 59502268 D1 19980625; EP 0776477 A1 19970604; EP 0776477 B1 19980520; JP H10504396 A 19980428; US 5963026 A 19991005
DOCDB simple family (application)
DE 9501079 W 19950816; CA 2198255 A 19950816; DE 19580887 T 19950816; DE 59502268 T 19950816; EP 95928432 A 19950816; JP 50769296 A 19950816; US 77668797 A 19970218